681390480 has 80 divisors (see below), whose sum is σ = 2163861504. Its totient is φ = 177269760.

The previous prime is 681390473. The next prime is 681390487. The reversal of 681390480 is 84093186.

It is an interprime number because it is at equal distance from previous prime (681390473) and next prime (681390487).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (681390487) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24784 + ... + 44463.

Almost surely, 2^681390480 is an apocalyptic number.

681390480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681390480 is an abundant number, since it is smaller than the sum of its proper divisors (1482471024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681390480 is a wasteful number, since it uses less digits than its factorization.

681390480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69304 (or 69298 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 681390480 is about 26103.4572422888. The cubic root of 681390480 is about 879.9649090691.

The spelling of 681390480 in words is "six hundred eighty-one million, three hundred ninety thousand, four hundred eighty".